Cover - shares	9 Months Ended
	Sep. 30, 2019	Oct. 25, 2019
Cover page.
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-5507
Entity Registrant Name	Tellurian Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	06-0842255
Entity Address, Address Line One	1201 Louisiana Street,
Entity Address, Address Line Two	Suite 3100,
Entity Address, City or Town	Houston,
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77002
City Area Code	832
Local Phone Number	962-4000
Title of 12(b) Security	Common stock, par value $0.01 per share
Trading Symbol	TELL
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		242,207,522
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0000061398
Current Fiscal Year End Date	--12-31